Merge tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg...

Pull iommufd fixes from Jason Gunthorpe:
 "A few minor fixes, other than the randconfig fix this is only relevant
  to test code, not releases:

   - Randconfig failure if CONFIG_DMA_SHARED_BUFFER is not set

   - Remove gcc warning in kselftest

   - Fix a refcount leak on an error path in the selftest support code

   - Fix missing overflow checks in the selftest support code"

* tag 'for-linus-iommufd' of git://git.kernel.org/pub/scm/linux/kernel/git/jgg/iommufd:
  iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED
  iommufd/selftest: Do not leak the hwpt if IOMMU_TEST_OP_MD_CHECK_MAP fails
  iommufd/selftest: Make it clearer to gcc that the access is not out of bounds
  iommufd: Fix building without dmabuf